A Statistics Professor Receives an Average of Five E-Mail Messages

question 75

Multiple Choice

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have no messages?

• A)0.0067
• B)0
• C)0.0335
• D)Impossible to have no messages

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Definitions:

Aquatic Ecosystem

A water-based environment, including oceans, rivers, lakes, and wetlands, where plants and animals interact with the physical and chemical features.

Sewage, Sludge

The semi-solid by-product of the sewage treatment process, often treated and disposed of or sometimes used as a fertilizer after undergoing further processing.

Deep-Water Ocean

Areas of the ocean that are located far from land, typically at depths greater than 200 meters, characterized by cold temperatures and high pressure.

Oil Pollution

The release of liquid petroleum hydrocarbons into the environment, particularly the marine ecosystem, due to human activity, leading to environmental damage.